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How do you do the foil method with polynomials?

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4

Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000